NEW YORK (CBSNewYork) —¬†Authorities are issuing a warning about an unusual scam that could reach you through your phone.

If your phone rings and someone asks “Can you hear me now?” — hang up. Your answer to the simple question from an unknown caller could make you a victim of the scam.

READ MORE: Lionel Virgile Accused Of Throwing Bleach In Officer's Face, Tossing Lit Molotov Cocktail At Other Officers In Brooklyn

What the scammer is trying to do is record your voice saying “yes!” thus authorizing unwanted charges on a phone or utility bill.

“It’s a verbal contract, just like clicking ‘I agree’ on a computer,” said Howard Schwartz of the Better Business Bureau.¬†“It’s called a voice signature and it’s used legitimately by companies to show that you’ve agreed to some sort of a change, usually an upgrade in some sort of a plan.”

READ MORE: Producer Scott Rudin Will 'Step Back' From Broadway Duties After Allegations Of Abusive Behavior

Tips to avoid this scam:

  • Don’t answer the phone from numbers you don’t know.
  • Don’t confirm your number over the phone.
  • Don’t give out personal information.
  • Don’t answer questions.

“If it’s an illegal marketing call and you press any button whatsoever, you’ve told them it’s a working number and you’re amenable to picking up the telephone when it rings,” Schwartz said.

Numbers can then be sold to many other scammers.

MORE NEWS: Police: Cocaine, Fentanyl, Loaded Guns Found During Bust At Channel Daycare On Long Island

One of the best ways to protect yourself is to get on the do not call list.